JAMB Biology Past Questions & Answers - Page 164

816.

In the male reproductive system of a mammal, sperm is stored in the?

A.

vas deferens

B.

urethra

C.

epididymis

D.

seminiferous tubules

Correct answer is C

No explanation has been provided for this answer.

817.

Which of the following stimuli is likely to elicit a nastic response in an organism?

A.

Wound lesion

B.

Light intensity

C.

Chemical substances

D.

Gravity

Correct answer is B

No explanation has been provided for this answer.

818.

The outer layer of the kidney where the Bowman's capsules are found is the

A.

cortex

B.

pelvis

C.

medulla

D.

pyramid

Correct answer is A

Each urinary tubule begins in the cortex as a cup-like structure known as the Bowman's capsule.

819.

The oily substance that lubricates the mammalian hair to keep it flexible and water repellent is secreted by the

A.

sweat glands

B.

sebaceous glands

C.

fatty cells

D.

granular layer

Correct answer is B

The normal function of sebaceous glands is to produce and secrete sebum, a group of complex oils including triglycerides and fatty acid breakdown products, wax esters, squalene, cholesterol esters and cholesterol. Sebum lubricates the skin to protect against friction and makes it more impervious to moisture.

820.

The sheet of muscle that separates the thoracic and the abdominal cavities is the

A.

diaphragm

B.

intercostal muscle

C.

pleural memberane

D.

pericardium

Correct answer is A

No explanation has been provided for this answer.