Biology A2, F2144 module 1: communication & homeostasis

Question 1 of 13

1

The difference between negative and positive feedback is:

Select one of the following:

One is always good for the body and one is always bad
Negative feedback uses neurones and positive uses hormones
Negative reverses a change away from optimum. Positive enhances it.
Negative feedback is part of the autonomic nervous system. Positive feedback is part of the somatic

Explanation

Question 2 of 13

1

Tick the boxes of the ectotherm/s

Select one or more of the following:

Explanation

Question 3 of 13

1

Which is the correct description of a motor neurone?

Select one of the following:

Small cell body at receptor, long dendron but short axon with numerous dendrites. Myelinated.
large cell body at Central Nervous System, long dendron with dendrites going to effectors. Non myelinated
large cell body at receptor, long dendrite, short axon but no dendron . Myelinated.
Large cell body at Central Nervous System and a long axon with dendrites. Myelinated.

Explanation

Question 4 of 13

1

Which is the correct shape of graph for the generation and conduction of an action potential?

Select one of the following:

Explanation

Question 5 of 13

1

In the conduction of an action potential, what happens after Na+ ion channels close ?

Select one of the following:

the sodium/potassium pump begins pumping 2K+ into the cell and 2Na+ out.
the cell repolarises.
K+ ion channels open.
The cell depolarises

Explanation

Question 6 of 13

1

Local Currents are...

Select one of the following:

When ions diffuse into the cell and gather in a high conc. at the point at which they diffused in, causing them to diffuse to an area of low conc. further down the cell.
The way in which an action potential appears to "jump" between the nodes of ranvier along a myelinated neurone.
the slow, smooth, linear flow of an action potential in a non-myelinated neurone due to the high concentrations of ions diffusing in through voltage gated channels and diffusing down the neurone.
Where several action potentials join together to make one, larger one.

Explanation

Question 7 of 13

1

What type of ion channels are present on the synaptic knob of a presynaptic neurone, that trigger the release of neurotransmitter?

Select one of the following:

Sodium/potassium pump
acetyl choline receptors
sodium ion channel
calcium ion channel

Explanation

Question 8 of 13

1

What is the name of the neurotransmitter in a cholinergic synapse and the enzyme that breaks it down?

Select one of the following:

Nor-adrenaline and Adrenelase
choline and cholinase
acetyl choline and acetylcholinesterase
acetate and acetatedecarboxylase

Explanation

Question 9 of 13

1

What are the two types of hormones>

Select one or more of the following:

First messengers
Peptide
Hexose
Steroid

Explanation

Question 10 of 13

1

cAMP is a...

Select one of the following:

hormone
chemical
enzyme
second messenger

Explanation

Question 11 of 13

1

Which chemical reaction does insulin trigger in hepatocytes?

Select one of the following:

glycolysis
glycogenesis
gluconeogenesis
glycogenolysis

Explanation

Question 12 of 13

1

Which of the following is NOT a risk factor for type 2 diabetes mellitus?

Select one of the following:

Family History
not being able to produce enough insulin
obesity
being of asian/afro-Caribbean origin

Explanation

Question 13 of 13

1

Which of these would lead to an impulse being sent down the vagus nerve?

Select one of the following:

rise in blood pressure
rise in activity in the limbs
fall in blood pH
Adrenaline being released into the blood

	Created by jamiemcparlin over 9 years ago

Quiz on Biology A2, F2144 module 1: communication & homeostasis, created by jamiemcparlin on 15/01/2015.

Biology A2, F2144 module 1: communication & homeostasis

Question 1 of 13

The difference between negative and positive feedback is:

Select one of the following:

Explanation

Question 2 of 13

Tick the boxes of the ectotherm/s

Select one or more of the following:

Explanation

Question 3 of 13

Which is the correct description of a motor neurone?

Select one of the following:

Explanation

Question 4 of 13

Which is the correct shape of graph for the generation and conduction of an action potential?

Select one of the following:

Explanation

Question 5 of 13

In the conduction of an action potential, what happens after Na+ ion channels close ?

Select one of the following:

Explanation

Question 6 of 13

Local Currents are...

Select one of the following:

Explanation

Question 7 of 13

What type of ion channels are present on the synaptic knob of a presynaptic neurone, that trigger the release of neurotransmitter?

Select one of the following:

Explanation

Question 8 of 13

What is the name of the neurotransmitter in a cholinergic synapse and the enzyme that breaks it down?

Select one of the following:

Explanation

Question 9 of 13

What are the two types of hormones>

Select one or more of the following:

Explanation

Question 10 of 13

cAMP is a...

Select one of the following:

Explanation

Question 11 of 13

Which chemical reaction does insulin trigger in hepatocytes?

Select one of the following:

Explanation

Question 12 of 13

Which of the following is NOT a risk factor for type 2 diabetes mellitus?

Select one of the following:

Explanation

Question 13 of 13

Which of these would lead to an impulse being sent down the vagus nerve?

Select one of the following:

Explanation