Afe Babalola University
BIO 103: Excitable Tissues Renal physiology and blood and Body fluids
Practice 432+ past questions for BIO 103 (Excitable Tissues Renal physiology and blood and Body fluids) at Afe Babalola University. Organized by topic with explanations. Free preview on Testwiz.
About BIO 103 at Afe Babalola University
BIO 103 at Afe Babalola University (ABUAD) covers excitable tissues, renal physiology, blood, and body fluids, with a strong emphasis on invertebrate zoology. This includes the classification, morphology, and anatomy of Porifera (sponges), Protozoa, Cnidaria, Platyhelminthes, and Nematoda. The course also examines key physiological processes such as digestion, body cavities, protozoan nutrition and locomotion, reproduction in protozoans, and the life cycles and adaptations of parasitic worms like Wuchereria bancrofti and Ancylostoma duodenale. This material is essential for students in biological and health sciences who need a solid foundation in comparative anatomy and physiology.
Practicing past questions by topic is one of the most effective ways to master BIO 103. Topic-specific practice helps you identify recurring concepts, understand how examiners frame questions on invertebrate classification or renal physiology, and reinforce your recall of detailed structures and life cycles. By focusing on one topic at a time, you can systematically build confidence and improve your performance in both continuous assessment and final exams.
Topics covered
Sample questions
1. The pre-larva stage of Wuchereria bancrofti is called
2. The anti-coagulant secreted by Ancylostoma duodenale during blood meal is called
3. Spongocoel is a cavity present in
4. The skin disease caused by penetration of larval stage of Ancylostoma duodenale into the skin is called
5. The females of Wuchereria bancrofti are ..... in term of reproduction
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What are the main differences between Porifera and Cnidaria in terms of body organization?
Porifera (sponges) lack true tissues and organs; they have a cellular level of organization with choanocytes for feeding and no nervous or digestive systems. Cnidaria (e.g., jellyfish, hydra) have tissue-level organization, with specialized cells like cnidocytes for defense and prey capture, and a simple nerve net. Cnidarians also possess a gastrovascular cavity with a single opening, whereas sponges have a system of canals and pores.
How does Wuchereria bancrofti complete its life cycle, and what disease does it cause?
Wuchereria bancrofti is a nematode transmitted by mosquitoes (Culex, Anopheles, Aedes). The adult worms live in the lymphatic system of humans, where females release microfilariae that circulate in the blood. When a mosquito bites an infected person, it ingests the microfilariae, which develop into infective larvae in the mosquito. The larvae are then transmitted to another human during a subsequent bite, where they mature into adults. This infection causes lymphatic filariasis, leading to elephantiasis (severe swelling of limbs or genitals).
What are the key adaptations of Ancylostoma duodenale for its parasitic lifestyle?
Ancylostoma duodenale (hookworm) has several adaptations: a buccal capsule with cutting plates or teeth for attaching to the intestinal wall and feeding on blood, anticoagulant secretions to prevent clotting, a robust cuticle to resist host digestive enzymes, and a life cycle that involves skin penetration by larvae (or oral ingestion) to reach the small intestine. It also has high fecundity, producing thousands of eggs daily, which ensures transmission through contaminated soil.