Question

1) How do striated and smooth muscles differ?

a) Striated muscle is involuntary, but smooth muscle is voluntary.?

b) Striated muscle has a banding pattern under the microscope, but smooth muscle doesn't.

c) Striated muscle can contract for a long period, but smooth muscle contracts very briefly.

d) Striated muscle cells have nuclei, but smooth muscle cells do not.

2) Which type of cell protects the body from the potentially harmful effects of ultraviolet radiation?

a) nervous

b) muscle

c) epithelial

d) connective

3) Which statement describes organs?

a) Each organ has a single function within the body.

b) An organ always contains at least three different tissue types.

c) Failure of an individual organ can affect an entire organ system.

d) Most organs function to provide the body with energy.

Answer 1

Solution

(1). (B) Striated muscle has a banding pattern under the microscope, but smooth muscle doesn't.

explaination

The presence of sarcomeres of striated muscles manifests as a series of bands visible along the muscle fibers, which is responsible for the striated appearance observed in microscopic images of this tissue.Smooth muscle does not have striations because it is arranged differently than straight muscle. The arrangement does not produce bandsin the cells.

(2). (C). Epithelial

Explaination

Epithelial cell because Melanin is a protective pigment in skin, blocking UV radiation from damaging DNA and potentially causing skin cancer.

(3).(C). failure of an individual organ can affect an entire organ system.

Explaination

If in our body one organ failed so it effect entire organ systems. For example in excretory system if kidney is damege than it effect on entire organ systems.