Section 1
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The Neurotransmitter _____ is used to promote muscle contraction
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Last updated
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Date created
Mar 1, 2020
Cards (85)
Section 1
(50 cards)
The Neurotransmitter _____ is used to promote muscle contraction
acetylcholine
The part of the blood which contains hemoglobin is
erythrocytes
Which of the following is correct for lipase
substrate = triglycerides Source = pancreas pH optimum = 8
Which vessels supply the heart with O2 and nutrients
coronary arteries
Extremely thin alveolar cells that are adapted to carry out gas exchange
Type 1 Pneumocytes
sequence of events in muscle contraction
release of calcium ions from the sarcoplasmic reticulum -> formation of cross bridges -> actin filament moves toward the center of the sarcomere -> use of ATP
synovial fluid
lubricates, decreases friction and provides nutrients to cartilage cells
How does the stomach prevent itself from being digested
mucus secretion and active mitosis of epithelial cells / pepsinogen not active until active site exposed by HCL
Which of the following will not chemically digest protein?
amylase and trypsin
Why are cattle able to survive on a planet diet
they have cellulose-digsted symboitc microorganisms in chambers of their stomachs
what is not a function of the liver
physically completes digestion, breathing
Which enzyme has an optimum pH of 2-3 in order to convert from its zymogen
pepsin
Blood w/ CO2 in it is delivers to the lungs by which vessel
pulmonary artery
The cells responsible for secreting pepsinogen are the
chief cells
Which of the following demonstrates negative feedback
After a meal, blood glucose becomes elevated, stimulating the beta cells of the pancreas to release insulin into the blood. Excess glucose is then converted to glycogen in the liver, reducing blood glucose levels.
Which group of animals have a long cecum
herbivores
A muscle fiber contains a bundle of
myofibrils
The main function of the colon is to
reabsorb water and compact undigested food
Most absorption takes place in this section due to finger like projections called
villi
the type of circulatory vessel that is one cell thick is the
capillary
1 muscle band of sarcomere is measured as the distance between 2
z lines
The enzyme secrete by the pancreas into the lumen of the small intestine carry out which of the following hydrolysis reactions
starch is digested to maltose by amylase // proteins & polypeptides are digested to shorter peptides by protease
Bile is responsible for
emulsifying lipids
A Protease is also known as an endopeptidage. This group of enzymes catalyzes the breakdown of
Proteins
In the lungs, the area of gas exchange w/ circulatory system takes place b/w the capillaries and the
aveoli
Hydrogen ions produced in the human red blood cells are prevented from significantly lowering the pH by combining with
hemoglobin
The human elbow is an example of a ____ joint
synovial
The 1st section of the small intestine receives juices from the bile duct & pancreatic duct :
duodenum
W/ its abundance of collangenous fibers cartilage is an example of
connective tissue
When you hold your breath, which of the following blood gas changes first leads to the urge to breathe?
rising CO2
Helicobacter pylori, not stress, is knwon to be the leading cause of
peptic ulcers
Tendons
attach muscle to bone
Tricep muscle
contracts to cause extension
What causes air to be breathed out by the lungs
The diaphragm relaxes and the ribs fall
Aveoli are best defined as
multilobed sacs encased in a network of capillaries
the heart is divided into two halves by the
septum
bicep muscle
contracts to cause flexion
The enzymes present in secretions of the pancreas are
lipase, amylase, trypsin (trypsinogen)
A valve in the heart preventing buck flow of blood from the pulmonary artery to the right ventricle is the
right semiluminar
ligaments
attach bone to bone
The enzyme responsible for regulatory blood pH by catalzing the production or decomposition of carbonic acid is
carbonic anhydrase
The diaphragm plays an important role in ventilation b/c it
creates a vacuum to draw in air due to negative pressure // contracts down to increase thoracic cavity
Which side of the heart contains oxygenated blood
left
The right atrioventricular valve (tricuspid valve) prevents back flow of blood from the
right ventrice to right atrium
Mark all regulatory proteins/ions involved in muscle contraction
Ca2+, troponin, tropomyosin
the chamber of the heart that pumps blood to the body through the aorta
left ventricle
During muscle contraction the ____ reduces in length
sarcomere
Positive feedback has occurred when
pressure of baby's head against receptors in the uterus stimulate contractions. The contractions result in greater pressure increasing the contractions and causing even more pressure until the baby is born
cartillage
decrease friction and absrorb compression
Blood leaves the lungs with O2 & returns to the heart by which vessel
pulmonary vein
Section 2
(35 cards)