Q 01/05

How many distinct types of muscle tissue does the human body have?

A) Three

B) Two

C) Four

D) Five

Answer · why

A) Three

Skeletal, cardiac and smooth, and only the first is under voluntary control.

Q 02/05

Roughly how many muscles does an adult human body contain?

A) About 200

B) About 400

C) Over 600

D) Over 1,000

Answer · why

C) Over 600

The exact count varies with the method used to count them.

Q 03/05

Which organ system joins with the muscular system to form the musculoskeletal system?

A) The nerves

B) The skeleton

C) The bloodstream

D) The skin

Answer · why

B) The skeleton

Tendons connect the two, letting muscles pull on bones to create movement.

Q 04/05

Which muscle type can work completely on its own, without the nervous system?

A) Skeletal

B) Smooth

C) Striated

D) Cardiac

Answer · why

D) Cardiac

Its rhythm is set by the sinus node, which the autonomic nervous system only influences.

Q 05/05

Which muscle type is non-striated?

A) Cardiac

B) Skeletal

C) Pennate

D) Smooth

Answer · why

D) Smooth

It lines organs and vessels and contracts slowly but strongly.