QUESTION 1 The neuromuscular junction is an example of which type of endocrine c

Question

QUESTION 1

The neuromuscular junction is an example of which type of endocrine commnication?

classic endocrine

autocrine

paracrine

none of the above

QUESTION 2

Neurosecretory cells located in the supraoptic and paraventricular nuclei of the hypothalamus release neurohormones into:

the anterior lobe of the pituitary gland

the posterior lobe of the pituitary gland

capillaries of the primary plexus

capillaries of the secondary capillary plexus

hypophyseal portal veins

QUESTION 3

Glucocorticoid hormones are produced in which of the following regions of the adrenal glands?

zona fasciculata

zona glomerulosa

zona reticularis

all of the above

none of the above

QUESTION 4

Which of the following processes will increase activity of a target cell for insulin?

decreased metabolism/excretion of insulin

increased affinity of the insulin receptor

increased secretion of insulin

All of the above

None of the above

QUESTION 5

Hormone A induces a response of X magnitude in a target cell. Hormone B induces a response of X in the same target cell. When given together the combined effect of hormones A and B is 3X. This is an example of what type of interactions between two hormones?

additive

antagonistic

synergistic

none of the above

my answers are bolded, can you provide explanation for why it is that answer

classic endocrine

autocrine

paracrine

none of the above

Explanation / Answer

1 . C paracrine

A neuromuscular junction ia a synapse between a skeletal muscle and a motor neuron in which neuron releases neurotransmitter in synapse that transmits to target muscle amd causes response to the stimulus.

2. C

The posterior pituitary possess axons of neurosecretory cells extending from supra optic and periventricular nuclei of hypothalamus. These axons secrete oxytocin amd vasopressin in neurohypophyseal capillaries to release them into systemic circulation.

3. A

Glucorticoids is produced by zona fasciculata of adrenal cortex which is situated between glomerulosa and reticularis the other two layers of cortex

4. D

Insulin is released when there is elevated concentration of glucose in blood. So all 3 reasons increase the glucose concentration hence increasing the activity of target cell of insulin

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