1917326
Pregunta 1
Pregunta
Which of the following correctly describe(s) the differences between muscle tissue types
Respuesta
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smooth muscle cells may have gap junctions, but skeletal muscle cells never have gap junctions
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skeletal muscle cells contain myofilaments, but smooth muscle does not
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cardiac muscle cells are multinucleate, but smooth muscle cells are uninucleate
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skeletal muscle is voluntarily controlled, but cardiac muscle is involuntary
Pregunta 2
Pregunta
Muscle compartments
Respuesta
-
are comprised of groups of muscles that work together (synergistically) to produce a movement
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are surrounded by connective tissue called perimysium
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are potential spaces created by interconnected connective tissues that extend from the superficial fascia to the endomysium of the muscle
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support the passage of large blood vessels and nerves supplying skeletal muscles
Pregunta 3
Pregunta
Motor neurons that control skeletal muscle
Respuesta
-
have cell bodies located in the gray matter of the spinal cord
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have one or more axons, depending on how many muscle cells it innervates
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may be controlled voluntarily or involuntarily
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with all the muscle cells it innervates comprises a motor unit
Pregunta 4
Pregunta
All of the required components of a polysynaptic reflex arc in correct sequence are
Respuesta
-
sensory neuron-motor neuron-effector
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sensory neuron-interneuron-motor neuron
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receptor-sensory neuron-interneuron-motor neuron-effector
-
receptor-interneuron-effector
Pregunta 5
Pregunta
The skeletal muscle stretch reflex does not result in conscious perception.
Respuesta
- True
- False
Pregunta 6
Pregunta
Proteins (choose all that apply)
Respuesta
-
may be used by cells to produce ATP
-
are built from 20 possible amino acids
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are monomers
-
are made by binding amino acids together by the process of dehydration synthesis (aka condensation)
Pregunta 7
Pregunta
The functions of proteins in human cells include (choose all that apply)
Respuesta
-
inheritance
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Support and intracellular movement
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transmembrane transport
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enzymes
Pregunta 8
Pregunta
The basic unit of life (choose all that apply)
Respuesta
-
must be able to respond to short-term changes in its environment and maintain function
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is classified as either carbohydrate, protein, lipid, or nucleic acid
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is able to reproduce itself
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is composed of the same set of chemical elements as non-living things
Pregunta 9
Pregunta
One important difference between living and non-living things is
Respuesta
-
only living things respond to short-term changes in the environment to maintain function
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non-living things do not absorb the energy of sunlight
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non-living things do not release energy
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carbon is found only in living things
Pregunta 10
Pregunta
Which one of the following best describes the metabolism of an organism
Respuesta
-
uses up a significant amount of ATP
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the efficient conversion of kinetic energy into potential energy
-
includes all the chemical reactions that take place within that organism
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must occur at a constant rate at all times
Pregunta 11
Pregunta
Cell membranes are made mostly of
Respuesta
-
cholesterol
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phospholipids
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proteins
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water
Pregunta 12
Pregunta
Enzymes (choose all that apply)
Respuesta
-
contain covalent bonds between monomers
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catalyze chemical reactions that otherwise would never happen
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are present at all times during the life of a cell
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are manufactured at ribosomes.
Pregunta 13
Pregunta
All cells must manufacture proteins, so all cells must have
Respuesta
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ATP
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DNA
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ribosomes
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amino acids
Pregunta 14
Pregunta
What do atoms form when they share a pair of electrons? (choose all that apply)
Respuesta
-
molecules
-
ions
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covalent bonds
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isotopes
Pregunta 15
Pregunta
The attraction of water molecules to each other (choose all that apply)
Respuesta
-
makes it easier for water molecules to evaporate
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allows them to dissolve all carbon containing molecules
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is best explained by their tendency to form hydrogen bonds
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helps the body resist changes in temperature
Pregunta 16
Pregunta
Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about ammonia (NH3)?
Respuesta
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each hydrogen atom in the molecule has a partial positive charge
-
the nitrogen atom has a strong positive charge
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each hydrogen atom has a slight negative charge
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there are hydrogen bonds between the hydrogen atoms of the NH3 molecule
Pregunta 17
Pregunta
Which substance is the most basic?
Respuesta
-
Vinegar pH 6.5)
-
Windex Window Cleaner (pH 7.8)
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Simple Green All-Purpose Cleaner (pH 9.5)
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Clorox (pH 8.2)
Pregunta 18
Pregunta
Chemical buffers help resist an acidic shift in pH by
Respuesta
-
combining with H+ released from acids
-
combining with OH-
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releasing H+
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forming hydrogen bonds
Pregunta 19
Pregunta
ATP (choose all that apply)
Respuesta
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is manufactured by re-arranging the carbon skeleton and other elements in food molecules
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cannot be stored in a cell for future use
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is both used and made in cellular respiration
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is a carbohydrate
Pregunta 20
Pregunta
Which of the following cell organelles provide a place for metabolic reactions that either make or use cellular energy?
Respuesta
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mitochondria
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nucleus
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rough endoplasmic reticulum
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golgi apparatus
Pregunta 21
Pregunta
Some white blood cells (WBCs) phagocytize invading pathogens, such as bacteria. Which of the following is/are true about this function?
Respuesta
-
WBCs manufacture digestive enzymes for intracellular destruction
-
Destruction of phagocytized material takes place in the cytosol of the WBC
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Phagocytosis is one form of active transport across the plasma membrane of the cell.
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Lysosomes are unique to some WBCs; not all cells have lysosomes since not all cells phagocytize bacteria.
Pregunta 22
Pregunta
Mitosis refers only to nuclear division. Separation of the entire cell into two daughter cells following mitosis is called
Respuesta
-
cytokinesis
-
mitosis
-
meiosis
-
karyokinesis
Pregunta 23
Pregunta
Phospholipids of the plasma membrane
Respuesta
-
are arranged as a bilayer with their polar heads sandwiched between the nonpolar tails
-
are arranged in a bilayer with their non-polar tails sandwiched between polar heads
-
around a central layer of cholesterol
-
prevent the passive transport of most water soluble solutes across the membrane
Pregunta 24
Pregunta
An example of a tissue in the body is
Respuesta
-
serous membrane
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epithelium
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stomach
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skeletal muscle cell
Pregunta 25
Pregunta
The zygote
Respuesta
-
is diploid
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is the origin of the tissues creating the embryo, but not the tissues that produce the placenta
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implants in the uterus
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is another name for an egg in the ovary
Pregunta 26
Pregunta
The process that involves the movement of cells into new relative positions in an embryo
Respuesta
-
produces the three embryonic germ layers
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is called cleavage
-
results in fertilization
-
results in morphogenesis
Pregunta 27
Pregunta
True or False. Without the formation of ectoderm, the embryo would not develop a nervous system.
Respuesta
- True
- False
Pregunta 28
Pregunta
Which of the following is/are true about a lumen in the human body?
Respuesta
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would be lined by an epithelial tissue
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is a space through which light is meant to pass
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is the hollow interior of an organ
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the surface of the body is considered a lumen, since it is covered with epithelial tissue
Pregunta 29
Pregunta
The skeletal system functions
Respuesta
-
as a boundary organ system, exchanging minerals with the outside environment
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to release calcium and other minerals from the matrix of bone tissue to help maintain homeostasis
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as the only protection for the visceral organs of the abdominal cavity
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produce movement, by providing a framework against skeletal muscle tissues work.
Pregunta 30
Pregunta
Compact bone tissue organization
Respuesta
-
covers the surface of all bones
-
around the medullary cavity of a long bone is surrounded by periosteum and lined by endosteum
-
contains osteons
-
lacks a direct blood supply
Pregunta 31
Pregunta
Which of the following is/are true about bone marrow
Respuesta
-
red bone marrow is found in flat bones only
-
bone marrow and all bone tissues are derived from endoderm
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red bone marrow produces red blood cells and yellow bone marrow produces white blood cells
-
yellow bone marrow contains connective tissues that support the passage of blood vessels and nerves in the medullary cavity of long bones
Pregunta 32
Pregunta
True or False. Canaliculi contain blood vessels that supply osteocytes with a means of nutrient and waste exchange.
Respuesta
- True
- False
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