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Science test: Excretory system > Male reproductive system > Flashcards

Male reproductive system Flashcards

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Biology 101 flashcards
1
Q

What are the functions of the testicles?

A

To produce sperm and the male sex hormone testosterone

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2
Q

What passes through the penis?

A

Urine and semen

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3
Q

What happens during sexual stimulation?

A

The arteries dilate and the penis becomes erect as the spongy tissues fill with blood.
The arteries filled with blood compress the veins and prevent blood from leaving the penis. Since blood is flowing into the penis faster than it is leaving, the penis lengthens, swells and hardens.

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4
Q

What does the swelling of the penis allow?

A

The penis to get closer to the cervix to release the sperm necessary for fertilization

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5
Q

What is ejaculation?

A

the expulsion of semen (sperm cells and fluid) from the penis.

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6
Q

Through what does expulsion/ejaculation occur?

A

The small contraction of small involuntary muscles

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7
Q

How much semen is released during a normal ejaculation?

A

2-5mL of semen, which contains an average of 350 million sperm cells

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8
Q

What does every hormone carry?

A

A message containing specific instructions made to target specific cells

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9
Q

Which glands are necessary for puberty and fertility in men?

A

The pituitary gland and testicles

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10
Q

What does the pituitary gland produce?

A 
Follicle stimulating hormone (FSH)
Luteinizing hormone (LH)
Growth hormone (GH)
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11
Q

What do the testicles produce?

A

Testosterone and sperm cells

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12
Q

Why does the pituitary gland play an important role in puberty in boys?

A

Mainly because it produces a growth hormone

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13
Q

What does GH stimulate?

A

The development of almost all tissues in the body, especially the muscles and bones

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14
Q

When does the pituitary gland make more GH in boys?

A

At 12 years old

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15
Q

What does the body increase in production at age 12?

A

GH, FSH, LH

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16
Q

What does FSH do?

A

Stimulates the production of sperm cells

17
Q

What does LH do?

A

Acts on the testicles, which begin to produce testosterone

18
Q

What secondary sex characteristics does testosterone boost the development of in males?

A 
Development of genital organs
Deeper voice
Increase in muscles
Hair: armpits, genitals, face
Mood changes
Increase in libido
Sperm production
19
Q

What is spermatogenesis?

A

The process by which the testicles make sperm cells

20
Q

When do boys produce enough sperm cells to become fertile?

A

At age 14

21
Q

Do men stay fertile all their life?

A

Many do, but the quantity and quality of dsperm cells diminishes with age

22
Q

Where does spermatogenesis end and begin?

A

It begins in the testicles and ends in the epididymis

Science test: Excretory system (5 decks)

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