muliple chooice 1. Which is the correct order in which a nervous signal passes t

Question

muliple chooice

1. Which is the correct order in which a nervous signal passes through a cell?

axon, dendrite, cell body

cell body, dendrite, axon

dendrite, axon, cell body

dendrite, cell body, axon

e) axon, cell body, dendrite

2.Female internal genitalia is produced when:

Wolffian ducts persist and Mullerian ducts regress

Wolffian ducts regress and Mullerian ducts persist

Both persist

d) Both regress

3.After the first trimester of pregnancy, what produces progesterone to maintain the endometrial lining of the uterus?

corpus luteum

placenta

hypothalamus

d) anterior pituitary

4. If scientists discovered a new hormone in the human body and the only thing they knew about it was that it is secreted from the hypothalamus, what would its probable target tissue be?

anterior pituitary

posterior pituitary

ovaries or testes

adrenal glands

e) thyroid gland

5. Substance T is found in a urine sample. What does this prove about substance T?

It is toxic.

It is a protein breakdown product.

It is filterable at the glomerulus or secretable from the peritubular capillary.

all of the above

none of the above

a)

axon, dendrite, cell body

b)

cell body, dendrite, axon

c)

dendrite, axon, cell body

d)

dendrite, cell body, axon

e) axon, cell body, dendrite

2.Female internal genitalia is produced when:

a)

Wolffian ducts persist and Mullerian ducts regress

b)

Wolffian ducts regress and Mullerian ducts persist

c)

Both persist

d) Both regress

3.After the first trimester of pregnancy, what produces progesterone to maintain the endometrial lining of the uterus?

a)

corpus luteum

b)

placenta

c)

hypothalamus

d) anterior pituitary

4. If scientists discovered a new hormone in the human body and the only thing they knew about it was that it is secreted from the hypothalamus, what would its probable target tissue be?

a)

anterior pituitary

b)

posterior pituitary

c)

ovaries or testes

d)

adrenal glands

e) thyroid gland

5. Substance T is found in a urine sample. What does this prove about substance T?

a)

It is toxic.

b)

It is a protein breakdown product.

c)

It is filterable at the glomerulus or secretable from the peritubular capillary.

d)

all of the above

e)

none of the above

Explanation / Answer

1. The correct order is- dendrite-cellbody-axon. Dendrite receives the signal from previous axon of a neuron and then stimulus is passed through cell body and finally through long extention called axon.

2. Female internal genitalia is produced from -Wolffian ducts regress and Mullerian ducts persist. Mullerian duct will give rise to female sex organ. When fetus has no Y chromosome Wolffian duct degenerates due to lack of male hormone testosterone. So when there is no Y then default fate that is femele starts to develop.

3. After first trimester progesterone is produced by placenta. Previously in first trimester it was produced by corpus letuem.

4. Hypothalamus is a part of brain. It secretes various neuro hormones (that is hormones produced from neurons). Various releasing hormones like TRH,GnRH, SRH stimulates anterior pituitary.

5. Toxic substances and metabolic waste are released through urine so the answer will be all the above.

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