The function of the sphincter at the downstream end of the stomach is to __________. retain acid chime in the stomach until pepsin digestion is complete release bile into the duodenum when chime is present release pancreatic secretions into the duodenum when chime is present release bile and pancreatic secretions into the duodenum when chime is present release acid chime into the duodenum in periodic squirts

The function of the sphincter at the downstream end of the stomach is to __________.
retain acid chime in the stomach until pepsin digestion is complete
release bile into the duodenum when chime is present
release pancreatic secretions into the duodenum when chime is present
release bile and pancreatic secretions into the duodenum when chime is present
release acid chime into the duodenum in periodic squirts

Question
3 of 45
Which of the following best describes the relationship of insulin to glucagon?
They work together to prepare the body to deal with stress.
Insulin stimulates the pancreas to secrete glucagon.
High levels of insulin inhibit pancreatic secretion of glucagon.
They are antagonistic hormones.
Insulin is a steroid hormone; glucagon is a protein hormone.
Question
4 of 45
Maintaining the volume and composition of body fluids is the direct responsibility of which of the following systems?
integumentary
immune
digestive
urinary
respiratory
Question
5 of 45
In vitro fertilization __________.
can be used to select the sex of an embryo
permits the screening of embryos for genetic defects
can use eggs that have been frozen
all of the above
none of the above
Question
6 of 45
Antibodies __________.
are shaped like the letter B
are generalists in that any antibody can bind to any antigen
consist of three polypeptide chains
assist in destroying particular antigens
All of the above are true
Question
7 of 45
Which of the following is one of the body’s first lines of defense against infection?
a group of nonspecific antibodies
several nonspecific amino acid toxins
several nonspecific obstacles such as skin and mucous membranes
increased production of certain hormones and changes in the blood circulation
an increasing in the breathing rate
Question
8 of 45
A vasectomy __________.
prevents the production of sperm in the testes
prevents the production of semen
prevents the movement of sperm into the urethra
prevents a man from having an erection
is an effective method to prevent the transmission of sexually transmitted diseases
Question
9 of 45
The appendix bone marrow thymus and spleen are all parts of the ______ system.
immune
circulatory
excretory
renal
digestive
Question
10 of 45
Which type of tissue forms a communication and coordination system within the body?
nervous
blood
epithelial
connective
muscle
Question
11 of 45
Why do diseases involving widespread infection usually result in a fever?
The rapid multiplication of the invading microorganisms results in extra heat production.
The inflammatory and immune responses result in extra heat production.
The invading microorganisms trick the brain’s temperature control center into raising the temperature so they can grow better.
The brain’s temperature control center responds to inflammation by creating a hot environment unfavorable to microorganisms.
Fevers insure that you will stay in bed longer so that your body can recover from the illness.
Question
12 of 45
When the wall of the stomach fails to protect itself from erosion by gastric juice the result is __________.
heartburn
reverse peristalsis
a duodenal ulcer
nausea
a gastric ulcer
Question
13 of 45
Most of the oxygen in the blood is transported by __________.
platelets
plasma
platelets
hemoglobin
serotonin
Question
14 of 45
What is the main function of connective tissue?
support
movement
protection
response to stimuli
covering
Question
15 of 45
Which of the following organs is NOT in the abdominal cavity?
stomach
liver
intestine
appendix
heart
Question
16 of 45
Temperature regulation hormone distribution and exchanging nutrients and wastes with the interstitial fluid are all functions of the __ system.
respiratory
digestive
immune
circulatory
nervous
Question
17 of 45
Most nutrient absorption occurs in which part of the digestive system?
stomach
liver
pancreas
small intestine
large intestine
Question
18 of 45
What are the four fundamental types of body tissues?
connective cardiac nervous and adipose tissue.
connective epithelial nervous and muscle tissue.
epithelial hormonal cellular and bone tissue.
epitheli al glandular muscle and nervous tissue.
connective neurons muscle and cartilage tissue.
Question
19 of 45
Homeostasis _______________.
is the maintenance of a constant internal state
only comes into play when you are ill
is a pathological condition
is the maintenance of a relatively stable internal environment
is the way the internal environment influences the external environment
Question
20 of 45

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