Respiratory System
Oxygen/carbon dioxide exchange (Lungs, trachea, larynx, nasal cavities, and pharynx)
Breakdown of which of the following begins
... [Show More] in the small intestine?
A. Fats
B. Fiber
C. Proteins
D. Carbohydrates
A. Fats
Which of the following is the tube that carries both sperm and urine for release outside the body?
A. Ureter
B. Urethra
C. Vans deferens
D. Epididymis
B. Urethra
Which of the following is the region of the kidney that contains the glomerulus of the nephron?
A. Medulla
B. Pelvis
C. Cortex
D. Adrenal
C. Cortex
Which of the following anti-body-secreting cells is triggered to proliferate upon vaccination?
A. Erythrocytes
B. B-lymphocytes
C. Leukocytes
D. T-lymphocytes
B. B-lymphocytes
Which of the following produces ammonia by deamination in the liver?
A. Proteins
B. Carbohydrates
C. Nucleic acids
D. Lipids
A. Proteins
A cross between two heterozygous F1 plants produces a ratio of 15:1 in the F2 offspring. Which of the following best describes the ratio?
A. Modified monohybrid ratio
B. Modified dihybrid ratio
C. Normal monohybrid ratio
D. Normal dihybrid ratio
B. Modified dihybrid ratio
The normal dihybrid ratio is 9:3:3:1, so this isi a modified dihybrid ratio. The monohybrid ratio is 3:1.
Which of the following best describes matter in which the components cannot be broken down into simpler substances?
A. Molecule
B. Element
C. Mixture
D. Compound
B. Element
An element is a substance made of a single type of atoms that are generally held together by physical forces.
Which of the following formulas best summarizes a simple replacement reaction?
A. A+B= AB
B. AB+C= AC+B
C. AB+CD= AD+BC
D. AB= A+B
B. AB+C= AC+B
This is a single replacement reaction because element B is replaced by element C.
Which of the following structures stores urine before excretion?
A. Kidneys
B. Ureters
C. Bladder
D. Urethra
C. Bladder
Which of the following structures is an irregularly shaped bone?
A. Femur
B. Metacarpal
C. Rib
D. Vertebra
D. Vertebra
Vertebrae are irregular bones. The femur is a long bone. Metacarpals are short bones. Ribs are flat bones.
In which of the following stages of embroylogical development are the main germ layers (ectoderm, endoderm, and mesoderm) formed?
A. Blastula
B. Morula
C. Gastrula
D. Fetus
C. Gastrula
During the gastrula stage, the germ layers are formed. During the blastula stage, the inner cell pmass and blastopore are formed. Embryogenesis is completed by the fetus stage.
Which of the following nervous system directs the skeletal muscles to respond in the body's fight-or-flight response?
A. Enteric
B. Central
C. Parasympathetic
D. Sympathetic
D. Sympathetic
The Sympathetic Nervous System activates the body;s fight-or-flight response. In the presence of stress, the heart beats faster and stronger, more blood is carried to the vital organs, and the pupils dilate to prepare the body to defend itself. The Enteric peripheral nervous system controls the digestive glands. The central nervous system typically produces reflex arcs and processes external stimuli. The parasympathetic nervous system promotes responses that are the opposite of the sympathetic nervous system, such as digestion and maintenance. [Show Less]