Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 38, Problem 21RQ
The cell membrane of a muscle fiber is called a ___________ .
- myofibril
- sarcolemma
- sarcoplasm
- myofilament
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A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
With reference to their absorption spectra of the oxy haemoglobin intact line) and deoxyhemoglobin (broken line) shown in Figure 2 below, how would you best explain the reason why there are differences in the major peaks of the spectra? Figure 2. SPECTRA OF OXYGENATED AND DEOXYGENATED HAEMOGLOBIN OBTAINED WITH THE RECORDING SPECTROPHOTOMETER 1.4 Abs < 0.8 06 0.4 400 420 440 460 480 500 520 540 560 580 600 nm 1. The difference in the spectra is due to a pH change in the deoxy-haemoglobin due to uptake of CO2- 2. There is more oxygen-carrying plasma in the oxy-haemoglobin sample. 3. The change in Mr due to oxygen binding causes the oxy haemoglobin to have a higher absorbance peak. 4. Oxy-haemoglobin is contaminated by carbaminohemoglobin, and therefore has a higher absorbance peak 5. Oxy-haemoglobin absorbs more light of blue wavelengths and less of red wavelengths than deoxy-haemoglobin
Chapter 38 Solutions
Biology 2e
Ch. 38 - Figure 38.19 Which of the following statements...Ch. 38 - Figure 38.37 Which of the following statements...Ch. 38 - Figure 38.38 The deadly nerve gas Sarin...Ch. 38 - The forearm consists of the radius and ulna radius...Ch. 38 - The pectoral girdle consists of the: clavicle and...Ch. 38 - All of the following are groups of vertebrae...Ch. 38 - Which of these is a facial bone? frontal occipital...Ch. 38 - Which of the following is not a true statement...Ch. 38 - The Haversian canal: is arranged as rods or plates...Ch. 38 - The epiphyseal plate: is arranged as rods or...
Ch. 38 - The cells responsible for bone resorption are...Ch. 38 - Compact bone is composed of trabeculae compacted...Ch. 38 - Osteoporosis is a condition where bones become...Ch. 38 - While assembling a skeleton of a new species, a...Ch. 38 - Synchondroses and symphyses are synovial joints...Ch. 38 - The movement of bone away from the midline of the...Ch. 38 - Which of the following is not a characteristic of...Ch. 38 - The elbow is an example of which type of joint?...Ch. 38 - A high ankle sprain iis an injury caused by over...Ch. 38 - In relaxed muscle, the myosin-binding site on...Ch. 38 - The cell membrane of a muscle fiber is called a...Ch. 38 - The muscle relaxes if no new nerve signal arrives....Ch. 38 - The ability of a muscle to generate tension...Ch. 38 - Botulinum toxin causes flaccid paralysis of the...Ch. 38 - What are the major differences between the male...Ch. 38 - What are the major differences between the pelvic...Ch. 38 - Both hydrostatic and exoskeletons can protect...Ch. 38 - Scoliosis is a medical condition where the spine...Ch. 38 - What are the major differences between spongy bone...Ch. 38 - What are the roles of osteoblasts, osteocytes, and...Ch. 38 - Thalidomide was a morning sickness drug given to...Ch. 38 - What movements occur at the hip joint and knees as...Ch. 38 - What movements) occur(s) at the scapulae when you...Ch. 38 - Describe the joints and motions involved in taking...Ch. 38 - How would muscle contractions be affected if ATP...Ch. 38 - What factors contribute to the amount of tension...Ch. 38 - What effect will low blood calcium have on...Ch. 38 - Skeletal muscles can only produce a mechanical...
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