Level 9 / Animal Reproduction / Quiz 1

Homeostasis is the regulation of body function to maintain a stable state. Which choice below represents a positive feedback mechanism?

• Blood sugar rises after eating a sweet snack. Insulin is released to lower the blood sugar.

• Body temperature increase while working out. Sweat is excreted to lower the temperature.

• Contraction of the uterus releases oxytocin. Oxytocin cause more uterine contraction.

• Core body temperature drops. Vasoconstriction keeps blood in core to rise temperature.

This organism is an example one that regulates its internal metabolic rate to generate a stable body temperature. What are these organisms known as?

• Ectotherms

• Endotherms

• Mesotherms

• Gastrotherms

Label the organs below.

g

h

a

b

c

d

e

f

Kidneys

Lungs

Heart

Small Intestine

Brain

Large Intestine

Liver

Stomach

What is the function of the digestive system?

• To convert food from large molecules into smaller molecules so they can be absorbed

• To move food through the alimentary canal by peristalsis

• To ensure enough nutrients reach all the cells

• To recycle red blood cells into a usable bile

Food moves through the alimentary canal by a wave-like reflex of smooth muscle called _____.

• Peristalsis

• Cardiac Cycle

• Digestive Reflex

• Digestive Reflexes

The act of breathing is a function of changing pressure in the lungs. The exchange of oxygen in the lungs is called ​ (a)   while the exchange of oxygen at the cellular level is called ​ (b)   .

• external respiration
• internal respiration

The lungs are a pair of large, sac-like organs that are the site of gas exchange. Inside the lungs are branched passageways leading to a cluster of vascular pouches. What are these pouches called?

• Trachea

• Bronchi

• Bronchioles

• Alveoli

The mammal closed circulatory system generally has two circulatory loops. The ​ (a)   circulation moves blood from the ​ (b)   side of the heart to the lungs. The ​ (c)   circulation moves blood from the ​ (d)   side of the heart to the rest of the body.

• Pulmonary
• right
• Systemic
• left

The blood flows through the heart and circulatory system in a specific order. Rearrange the following to reflect that correct order. Start with blood in the right atrium of the heart and go from there.

• Left Ventricle

• The Body

• Right Ventricle

• Lungs

• Left Atrium

The endocrine system produces chemical signals called ____ that work with the nervous system to control most functions of the body.

• hormones

• proteins

• insulin

• neurotransmitters