Exam 23: Animal Tissues and Organ Systems

When a blood clot begins to form,the enzyme thrombin is formed.Thrombin then activates the enzymes that produce more thrombin.This is an example of ________ feedback.

Which tissue within skin is responsible for producing sweat?

Muscle tissue that is controlled involuntarily and has no striations is

You are asked to research what the eye is.You read that it contains nerves,muscles,and blood cells.Therefore,you decide that it is a(n)

An action that counters an existing condition is called

Our cells use vitamin C to make collagen,and people on a diet deficient in vitamin C have increased risk of small blood vessels rupturing.Which is the best explanation for this observation?

The body's first line of defense against disease-causing microorganisms is the

The type of epithelial tissue that forms a single layer of elongated cells is

Blood flow is increased by vasodilation,or widening of the blood vessel.Which tissue is responsible for vasodilation?

The systems that coordinate communication are

If you observe that the hypothalamus of a newly discovered animal stimulates blood vessels in the skin to relax in response to excessive body temperature,you know that it is an ectotherm.

The liver produces 90% of the cholesterol in your body.Most cholesterol is transported in the blood as low density lipoprotein (LDL).When the levels of blood LDL increase,the enzyme in the liver that makes cholesterol is inhibited.This is an example of ________ feedback.

The type of epithelial tissue that forms multiple layers of flattened cells is

The tissue that makes up the spinal cord and brain consists of

The tissue type that provides contractions that power movement is

Feathers,whether on an ancient dinosaur or a modern bird,can help in thermoregulation by holding onto body heat.

Most burn victims who have substantial damage to their skin are prescribed powerful antibiotics because the intact skin is the first defense against bacterial infections.

The cross-sectional area of the nasal cavity can be an important indicator of whether an animal is an endotherm or an ectotherm.

Scleroderma is an autoimmune disease in which repeated bouts of inflammation result in collagen deposits in the skin.Which would be a symptom of scleroderma?

You are working in a diagnostic lab,and you receive a skin biopsy sample.The sample shows several groups of cancerous cells in the epithelium,so you say in your report that you found several