Choose the one most appropriate response for each.
A. dense, regular connective tissue
B. loose connective tissue
C. neuron
D. adipose tissue
E. epidermis
F. exocrine gland
G. blood
H. interstitial fluid
A. comprises ligaments and tendons
B. contains collagen and elastin in a disordered gel-like matrix underlying most epithelia
C. receives, conducts, and initiates signals in response to environmental changes
D. stores fat
E. offers resistance to mechanical injury and loss of internal fluids; also a barrier against microorganisms
F. secretes extracellular products such as milk, mucus, tears, and saliva through ducts
G. fluid ground substance plus free cells; involved in transport, pH, and temperature stability
H. extracellular fluid that bathes cells and tissues
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Answer the following statements true (T) or false (F)
1. When Schmidt-Nielsen and his colleagues followed a "pulse" of air through the respiratory system of an ostrich, it took two full cycles of inhalation and exhalation for this pulse to pass through and be exhaled. 2. Chemoreceptors for oxygen normally play the most important role in regulating breathing rate. 3. Smaller mammals typically have higher ventilation rates than large mammals. 4. The shape of the oxygen-hemoglobin dissociation curve is a straight line. 5. Asthma attacks result from contraction of the muscles surrounding the bronchioles.
What are two typical ratios that result from crossing heterozygotes with homozygous organisms?
What will be an ideal response?
What is the significance of having specialized epithelium and smooth muscle in the urinary bladder?
a. It helps reabsorb water. b. It helps reabsorb salts. c. It permits the diffusion of gases. d. It is capable of shrinkage and stretching. e. It protects the bladder from nitrogenous wastes.
The dominant generation in the fungal life cycle is usually
A) unicellular. B) a sporophyte. C) diploid. D) polyploid. E) haploid.