Which of the following statements about hemoglobin is false? a. hemoglobin is a very large protein...

Which of the following statements about hemoglobin is false?

	a.	hemoglobin is a very large protein composed of four large protein subunits
	b.	there are two alpha (α) and two beta (β) subunits in each hemoglobin molecule
	c.	each alpha and beta subunit includes a heme group
	d.	oxygen (O₂) molecules bind irreversibly to an iron ion (Fe⁺⁺) in a heme group

Which of the following statements about oxygen delivery to the body tissues is false?

	a.	low oxygen concentration in the body tissues enhances the unbinding of oxygen (O₂) from hemoglobin
	b.	hemoglobin usually loses all four oxygens (O₂) when they unbind in the tissues
	c.	body tissues have greater acidity (higher hydrogen ion (H⁺) concentration (lower pH) than the lungs
	d.	higher acidity (higher hydrogen ion (H⁺) causes hemoglobin to release more oxygen (O₂

Digestion is necessary because…

		large biomolecules cannot pass through cell membranes
		the absorption of food requires energy (is endergonic)
		only monomers are absorbed through the lining of the small intestine
		all except choice (b) are correct

Which of the following is not a type of biomolecule that must be digested before it can be absorbed?

	a.	long-chain carbohydrate molecules
	b.	protein molecules
	c.	nucleic acid molecules
	d.	water-soluble vitamins

Which of the following is not a function of human blood?

	a.	blood transports oxygen and nutrients to all body cells
	b.	blood transports carbon dioxide and other metabolic wastes from cells
	c.	blood helps maintain the body’s internal pH and water concentration
	d.	blood exchanges gases with the atmosphere primarily through the skin

Which of the following statements about human blood is false?

	a.	blood plasma makes up more than half of the volume of normal blood
	b.	blood plasma is mostly water, with dissolved ions, amino acids, glucose, hormones, proteins, and other materials
	c.	white blood cells (leukocytes) make up about 40% of the volume of normal blood
	d.	red blood cells (erythrocytes) are the most common blood cells

Solutions

Expert Solution

Correct Option: d because it is false-

The reversible nature of the binding of oxygen allows for both the uptake of oxygen in the lungs and its release in body tissues. The heme molecules each contain a single central iron atom and are responsible for giving the red colour to haemoglobin, and thus to the blood as a whole.

Correct-a : beacuse it is wrong

The Bohr Effect refers to the observation that increases in the carbon dioxide partial pressure of blood or decreases in blood pH result in a lower affinity of hemoglobin for oxygen.

Correct-d : Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.

Correct-d Water soluble vitamins of dietary origin are absorbed predominantly in the small intestine, whereas those synthesized by microbes in the large intestine are absorbed there.

Correct-d blood exchanges gases with the atmosphere primarily through the alveoli of lungs.

Correct-c : Red blood cells make up about 45% of the blood volume. White blood cells make up about one percent and platelets less than one percent. Plasma makes up the rest of the blood.

Sydney Mullin answered 10 months ago

Next > < Previous

Related Solutions

Which of the following statements about heterotrimeric G proteins is FALSE. Upon activation by a G-protein...

Which of the following statements about heterotrimeric G proteins is FALSE. Upon activation by a G-protein coupled receptor, the G-protein usually breaks into two complexes, each of which can activate target proteins. The α subunit is bound to GTP when the protein is in the inactive state The activated a subunit switches itself off by hydrolyzing its bound GTP G-proteins can activate membrane-bound enzymes and ion channels Once activated by a receptor, the α subunit can dissociate from the receptor

Which of the following statements about receptor potentials is FALSE?

Which of the following statements about receptor potentials is FALSE? A. They are changes in the resting membrane potential of a sensory cell in response to a stimulus. B. The receptor potential spreads from the cell body of a sensory cell to the axon hillock, where action potentials can be generated C. One receptor potential always prompts the release of a neurotransmitter that induces an associated neuron to generate an action potential. D. They must be converted into action potentials...

Which of the following statements about the nuclear envelope is FALSE?

Which of the following statements about the nuclear envelope is FALSE? A. It is composed of two membranes (a double membrane) B. Unlike other membranes in the cell, it primarily consists of complex polysacchrides such as cellulose C. It is supported by a cytoskeletal network known as nuclear lamina D. It contains pores for the passage of large molecules E. It contains the chromosomal DNA of eukaryotic cells

Which of the following statements about codes of conduct is false? -They are formal statements of...

Which of the following statements about codes of conduct is false? -They are formal statements of what an organization expects of its employees. -They guarantee an ethical business climate. -They help employees determine what behaviors are acceptable. -They provide rules and guidelines for employees to follow. -They should be specific enough to be reasonably capable of preventing misconduct. ____________________________________________________________________________________________________ While ideally the board of directors financial audit committee conducts ethics audits, in most firms they are conducted by: -managers or...

Which of the following statements about perfect price discrimination is false?

Which of the following statements about perfect price discrimination is false?A condition for perfect price discrimination is that it must be costlier to service some customers than others.There is no consumer surplus if a firm engages in perfect price discrimination.For the price-discriminating firm, its marginal revenue curve coincides with its demand curve.Perfect price discrimination occurs when the seller charges the highest price each consumer would be willing to pay for the product.

Decide which of the following statements are True and which are False about equilibrium systems: If...

Decide which of the following statements are True and which are False about equilibrium systems: If K = 8 for the reaction A + B ⇌ C + D, K will equal -8 for the reaction C + D ⇌ A + B For a reaction with K >> 1, the rate of the forward reaction is less than the rate of the reverse reaction at equilibrium. The value of K at constant temperature does not depend on the amounts...

Decide which of the following statements are True and which are False about equilibrium systems: The...

Decide which of the following statements are True and which are False about equilibrium systems: The value of K at constant temperature depends on the amounts of reactants and products that are mixed together initially. For a reaction with K >> 1, the rate of the forward reaction is less than the rate of the reverse reaction at equilibrium. A large value of K means the equilibrium position lies far to the left. For the following reaction: CaCO3(s) ⇌ CaO(s)...

Identify which of the following statements is false A. Regardless of how large the gross estate...

Identify which of the following statements is false A. Regardless of how large the gross estate is, the estate tax liability can be completely eliminated if the estate is willed to a charitable organization. B. The Lifetime Exemption applies only to gifts given. C. Casualty or theft losses incurred during the administration of the estate are deductible on the estate tax return. D. The estate tax return is due, ignoring extensions, 9 months after the decedent's date of death....

Which of the following statements about process efficiency is FALSE? A process is efficient if it...

Which of the following statements about process efficiency is FALSE? A process is efficient if it is able to achieve a high flow rate with few resources. Cost of direct labor goes up if flow rate goes up Revenue goes up if flow rate goes up Cycle time goes up if flow rate goes down.

Which of the following statements about a journal entry is false? An increase in an asset...

Which of the following statements about a journal entry is false? An increase in an asset account is compatible with an increase in a liability account. An increase in an asset account is compatible with a decrease in an asset account. An increase in a liability account is compatible with an increase in retained earnings. A decrease in an asset account is compatible with a decrease in owners' equity.

Subjects